Apparatus for the manufacture of nitroglycerin.



No. 702,325. Patented Jung I0, I902. F. L. NATHAN, J. NI. THOMSON & W. RINTOUL. APPARATUS FOR THE MANUFACTURE OF NITBDGLYCERIN.

(Application filed Mar. 7 1.902.}

(No model.)

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cal section of apparatus according to our branches 6, leading to the acid-tank, and f, to

15,983,) of which the following is a specifica- UNITED STATES PATENT OFFICE. T

.FREDERIO LEWIS NATHAN, JAMES MILN THQMSON, AND WILLIAM RINTOUL, OF WALTHAM ABBEY, ENGLAND.

APPARATUS FOR THE MANUFACTURE OF NITROGLYCERIN.

SPECIFICATION forming part of Letters Patent No. 702,325, dated. June 10, 1902.

Application filed March '7,1902..

To all whom it may concern:

Be it known that we, FREDERIC LEWIs NA- THAN, JAMES MILN THOMSON, and WILLIAM RINTOUL, citizens of England, residing at the Royal Gunpowder Factory, Waltham Abbey, in the county of Essex, England, have invented a certain new and useful Improved Apparatus for the Manufacture of Nitroglycerin, (for which we have applied for a patent in Great Britain dated August 8, 1901, No.

tion. 7

This invention relates to apparatus for the manufacture of nitroglycerin, so arranged that the nitration of the glycerin, the separation of the nitroglycerin produced, as well as the operation usually known as after separating, are carried out in one vessel. For this purpose we providethe usual nitrating vessel with an acid-inlet pipe at the bottom and a glassseparation-cylinder with a lateral exit or overflow pipeat the top. This cylinder is covered by a glass hood or bell-- jar during nitration to direct the escaping air and fumes. into a fume-pipe, where the flow of the latter may be assisted byanairinjector. The lateral pipe in the separationcylinder is in connection with a funnel'leading to the pro-wash tank.

The accompanying drawing shows a vertiinvention.

a is a nitrating vessel of usual construction, having at the bottom an acid-inlet pipe with three branches, one, I), loading to the denitrating plant, 0, leading to the drowning-tank, and d, which extends upward and has two the waste-acid tank. I

On the sloped bottom of thenitrating vessel a. lies a coil g of perforated pipefor blowing air, and'there are in the vessel several coils it (three shown in the drawing)for. circulation of cooling-water. At the top of the V95? sel there is a glass cylinder 2', having a lateral $erialNo. 97,166. (No model.)

outlet j, directed into the funnel-mouth of a pipe 7c,"leading to the pro-wash tank. Over the cylinder 2' is a glass globe Z, into which opens a pipe m for leading ofi fumes which may be promoted by a compressed-air jet from a pipe 2", operating as an ejector. Into an opening of the glass dome Zis inserted a vessel 'n,which is connected by a flexible pipe 19 to the glycerin-tank,and the bottom of vessel'nis perforated and covered with a disk perforated with holes registering with those through the bottom, this disk beingconnected by a stem with a knob g, by which it can be turned so as to throttle or cut off passage of glycerin through the bottom. 3 is a thermometer for indicating the temperature of the contents of the vessel. 7

In operating with this apparatus the nitrating-acid is introduced into the nitrating vessel byopening the cock of the pipe 6. The glycerin is thenrun in by introducing vessel n and opening the Valve at its bottom, the contents of thevessel being agitated by air blown through the perforations of the pipe g. When the glycerin is all nitrated and the temperature has slightly fallen, the circulation of water through the coils h and the air-stirring are stopped, the, glycerin-supply vessel 02 is removed. The nitroglycerin as it separates from the acids is raised by introducing by the pipe f waste acid from a previouscharge, this displacing the nitroglycerin upward and causing it to flow by the outlet j and pipe 7.: to the pro-washing tank. When nearly all the nitroglycerin has been separated in this manner, the acids in the apparatus may be run off by the pipe I) to an after-separating vessel for further settling, thus leaving the apparatus free for another nitration, or the nitrating vessel itself maybe used as an after-separating bottle, displacing the nitroglycerin with wasteacidas it rises tothe top or skimming off in the usual manner. When the separation of the nitroglycerin is complete, the waste acid is run 0E and denitrated In testimony whereof we have hereunto set our hands in presence of two subscribing witnesses.

FREDERIG LEWIS NATHAN. JAMES MILN THOMSON. WILLIAM RINTOUL.

Witnesses to the signature of Frederic Lewis Nathan:

ROBERT J. BIRD, R. ENDERLY. Witnesses to the signatures of James Miln Thomson and W'illiam Rintoui:

GEO. M. FRANKLIN, W. M. HARRIS. 

